package com.entfrm.biz.it.config;

import lombok.extern.slf4j.Slf4j;
import org.springframework.aop.interceptor.AsyncUncaughtExceptionHandler;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;
import org.springframework.scheduling.annotation.AsyncConfigurer;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;

import java.lang.reflect.Method;
import java.util.concurrent.Executor;
import java.util.concurrent.ThreadPoolExecutor;

/**
 * <h3>entfrm</h3>
 * <p>原生(Spring)异步任务线程池装配类</p>
 *
 * @author : kyc
 * @date : 2020-08-18 10:59
 **/
@Slf4j
@Configuration
@PropertySource(value = "classpath:config.properties")
public class AsyncExecuteThreadPool implements AsyncConfigurer {

    /**
     * 核心线程池大小
     */
    @Value("${async.pool.corePoolSize}")
    private int corePoolSize;

    /**
     * 最大线程数
     */
    @Value("${async.pool.maxPoolSize}")
    private int maxPoolSize;

    /**
     * 活跃时间
     */
    @Value("${async.pool.keepAliveSeconds}")
    private int keepAliveSeconds;

    /**
     * 队列容量
     */
    @Value("${async.pool.queueCapacity}")
    private int queueCapacity;

    @Override
    public Executor getAsyncExecutor() {
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        //核心线程池大小
        executor.setCorePoolSize(corePoolSize);
        //最大线程数
        executor.setMaxPoolSize(maxPoolSize);
        //队列容量
        executor.setQueueCapacity(queueCapacity);
        //活跃时间
        executor.setKeepAliveSeconds(keepAliveSeconds);
        //线程名字前缀
        executor.setThreadNamePrefix("CP Thread-");

        // setRejectedExecutionHandler：当pool已经达到max size的时候，如何处理新任务
        // CallerRunsPolicy：不在新线程中执行任务，而是由调用者所在的线程来执行
        executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
        executor.initialize();
        return executor;
    }


    /**
     *  异步任务中异常处理
     * @return
     */
    @Override
    public AsyncUncaughtExceptionHandler getAsyncUncaughtExceptionHandler() {
        return new AsyncUncaughtExceptionHandler() {
            @Override
            public void handleUncaughtException(Throwable arg0, Method arg1, Object... arg2) {
                log.error("=========================="+arg0.getMessage()+"=======================", arg0);
                log.error("exception method:"+arg1.getName());
            }
        };
    }

}
